Best Brush Cutter Blades for Clearing Thick Weeds
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Brush cutter blades come in several forms: plastic and nylon line for soft growth, metal blades for dense weeds, and circular saw blades for stems and small branches. This guide compares the brush cutter blades and attachments in the product data, using only what each listing states about cutting width, blade type, compatibility, included parts and warranty. The right blade depends on what you are cutting, and the listings do not all describe the same job.
Quick answer
- For thick weeds and light brush, a metal or saw blade on a dedicated brush cutter head is the type the listings name for that job.
- For soft grass and edge trimming, plastic or nylon blades are the type the listings describe.
- Check compatibility first. A brush cutter attachment must match your power head, and a DEWALT-compatible trimmer must match a DEWALT battery.
- Use the cutting width and blade size stated in the listing to match the blade to the stems you plan to cut.
How to choose a brush cutter blade
A brush cutter blade has to suit three things: the material it will cut, the head that holds it, and the safety guard that comes with it. Start with the material. Listings in this group describe plastic blades for soft grass, rhombus or straight metal blades for weeds and small shrubs, and saw blades for pruning branches. Those descriptions are useful, but they do not replace the diameter and thickness you need for a particular stem size.
Next, check the head. Some listings are attachments for a specific power head, such as a 56-volt EGO system or a 20V DEWALT-compatible trimmer. Others are universal attachments that list a range of brands. A universal listing still needs a matching drive shaft and coupler, so check the shaft dimensions and the power head coupler before buying.
Finally, check the guard and the instructions. Several listings in this group say the guard must stay on and the power must be off before a blade is changed. Treat those lines as the minimum. Wear gloves when changing a blade, because the listings describe the blades as very sharp.
Blade types in the listings
Plastic and nylon blades
Plastic blades are listed for soft grass and light trimming. They are the gentlest option for lawn edges and garden beds. The listings describe them as safer for soft plants, though they will not cut thick stems. Nylon line is listed for trimming tall grass, and the listings note that it must be wound or fed through the head.
Metal and rhombus blades
Metal blades are listed for dense grass, weeds, bushes and thorns. A rhombus or straight metal blade is described as suitable for weeds and small shrubs. These blades cut faster than plastic, but they need more care around fences and stakes, because a metal edge can nick a post.
Circular saw blades
Saw blades are listed for thicker shrubs, branches and saplings. One listing says a saw blade cuts branches up to 1 inch. Another lists a 6-inch diameter saw blade with a 5mm aperture and 1.1mm thickness. Saw blades are the choice when the stem is thicker than a weed, and the listing for each blade should be checked for diameter and thickness.
Compare the listed blades and attachments
Each block below uses only the facts stated in the listing.
1. Electric Cordless Weed Wacker with 4 Types Blades and Wheels
This cordless 3-in-1 trimmer is listed with a 20,000 rpm pure copper motor, two 2000mAh batteries and four blade types: plastic for soft grass, rhombus for weeds and small shrubs, saw blades for pruning branches, and string for tall grass. The listing includes 10 metal blades, 10 plastic blades and 2 saw blades. It also gives a telescopic shaft of about 47 inches and a weight of 3.28 pounds. It is a good match for someone who wants a full blade set on one tool.
2. Cordless Weed Wacker for DEWALT 20V Battery with 4 Types Blades
This tool-only trimmer is listed as compatible with several DEWALT 20V batteries, including DCB200 and DCB204. The listing says the battery is not included. It describes a brushless motor with a no-load speed up to 23,000 rpm, four blade types including round saw blades and metal blades, and a telescopic shaft from 37 to 53 inches. The listed weight is 4.3 pounds. Choose it if you already own a compatible DEWALT battery and want saw blades on a light tool.
3. Weed Wacker Battery Operated 21V 2000mAh, 3-in-1 Brush Cutter Edger
This kit is listed with two 21V lithium ion batteries and a fast charger, plus 16 blades in total: 10 plastic blades, 2 circular saw blades up to 1 inch, 2 alloy blades and 2 S-shaped blades. The listing describes a 90 degree adjustable head and a telescopic pole from 33 to 43 inches. It also states a tool-free blade change. Its listed weight is 6.3 pounds. It fits someone who wants a variety of blades and a battery kit in one box.
4. 7-Piece Manganese Stainless Steel Round Weed Wacker Saw Blade Attachments
This set is listed as seven parts: two circular saw blades, two nuts, two shims and a lawn mower wrench. The blades are listed at 6 inches in diameter, with a 5mm aperture and 1.1mm thickness. The listing says the blades are suitable for cutting thicker shrubs and branches and for trimming soft grass. It also gives a clear safety line: keep the power off when changing blades, and do not remove the guard to use the blade. This set suits a user who needs replacement saw blades for an existing trimmer.
5. EGO Power+ BCA1220 12-inch Brush Cutter Attachment
This attachment is listed as exclusively compatible with the EGO POWER+ multi-head system power head PH1420, which is sold separately. It has a 3-tooth steel blade with a 12-inch cutting width, a maximum speed of 6000 rpm and a carbon fiber shaft. The listing states clearing overgrown brush, thick stalky vegetation and saplings up to 1 inch thick, with an IPX4 rating and a lifetime warranty. The listed weight is 2.2 pounds. It fits an existing EGO multi-head owner who needs a wider brush blade.
6. 8-inch Brush Cutter Attachment Compatible with Different Power Heads
This universal attachment is listed with an 8-inch cutting width and a 3-tooth steel tri-arc blade. The listing says it fits power heads from several brands, including Ryobi, Greenworks, Craftsman, Troy-Bilt and Kobalt. It includes a front handle, a wrench and a hanger cap. The drive shaft is listed as a square shape of 0.200 inches across flats, and the coupler accepts a 1-inch tube. The listed weight is 3.3 pounds. Check the drive shaft and coupler dimensions against your power head before ordering.
Review: the 12-inch EGO brush cutter attachment in depth
The EGO attachment is the most specific listing in this group, so it is the best example of how to read a brush cutter blade listing. Its 3-tooth steel blade is listed at 12 inches, which is wider than the 6 and 8 inch saw blades and the 8 inch universal attachment. The listing gives a maximum speed of 6000 rpm and says it is for clearing overgrown brush, thick stalky vegetation and saplings up to 1 inch thick. Those are the stems it is listed to cut, and that limit is the number to plan around.
The carbon fiber shaft is listed as extremely durable, and the listing gives a lifetime warranty. The attachment is listed as IPX4 weather resistant. The weight is 2.2 pounds. Because it is exclusively compatible with the PH1420 power head, the power head is a separate purchase and must be owned or bought at the same time. That single compatibility line decides whether this attachment is right for you.
Two close alternatives from this group are the 8-inch universal attachment, which fits several brands but lists a narrower path, and the DEWALT-compatible trimmer with a round saw blade, which is a lighter tool with a smaller cut width. Choose the EGO attachment if you already own the PH1420 and need a wide brush blade. Choose the universal attachment if you have another brand of power head.
Who each blade type suits
A homeowner with mostly soft grass along a fence line will get the most from plastic or nylon blades, which the listings describe as gentle on soft plants. A gardener clearing dense weeds and small shrubs around a garden bed fits the metal and rhombus blade listings, which name weeds and small shrubs as their job. Someone who regularly faces woody growth, such as saplings or thick branches, should look at the saw blade listings and check the stated size limit before cutting. Someone who owns a single battery platform should pick a kit or tool that lists compatible batteries and includes the blade types needed, rather than buying blades one at a time. The listings do not say how long any blade lasts, so plan to inspect the blade and replace it when it dulls or is damaged.
Mistakes to avoid
- Buying an attachment that does not match the power head. The EGO listing names one power head as the only match.
- Using a saw blade on a stem thicker than the listing states. The saw blade listings name a size limit such as 1 inch.
- Removing the guard. Several listings say the guard must stay on, and one says the blade must not be used without it.
- Changing a blade with the power on. The listings say to turn the power off first and to wear gloves.
- Assuming a tool-only trimmer includes a battery. The DEWALT-compatible listings say the battery is not included.
FAQ
What blade cuts thick weeds?
The listings describe metal and rhombus blades for weeds and small shrubs, and saw blades for branches. Use the blade type and size named in the listing for the stem you plan to cut.
Can I use a plastic blade for brush?
The listings describe plastic blades for soft grass and light trimming, not for thick brush. For brush, choose a metal or saw blade.
How big a stem can a saw blade cut?
One listing says its saw blades cut branches up to 1 inch. Another lists a 6-inch blade with a 5mm aperture. Use the size named in the listing you buy and do not exceed it.
Do I need a separate power head for a brush cutter attachment?
Yes. Attachments such as the EGO BCA1220 are listed for one power head, which is sold separately. Universal attachments list several brands, but the drive shaft and coupler must match.
Are these blades safe to change at home?
The listings say to turn the power off, keep the guard on and wear gloves. Read your tool’s manual for the exact blade-change steps.
What should I check before buying a brush cutter blade?
Check the material it cuts, the head or power head it fits, the blade diameter and thickness, and whether a battery or power head is included.
Bottom line
Choose a brush cutter blade by the stem size you cut. Plastic blades suit soft grass, metal blades suit weeds and small shrubs, and saw blades suit branches. Match the attachment to your power head before you buy, and keep the guard on whenever you work.
Sources
This post relies on product listing data only. No separate reference page was used.
